Catalysis Letters

, Volume 113, Issue 3–4, pp 109–114 | Cite as

C2H2-SCR of NO over HZSM-5 affected by intracrystalline diffusion of NO x

  • Xinping Wang
  • Hongliang Yang
  • Qing Yu
  • Shixin Zhang


The influence of particle size of HZSM-5 zeolite on selective catalytic reduction of NO by acetylene (C2H2-SCR) was investigated. The zeolite with nano-particle behaved considerable higher activity than the micro-particle one for the reaction. It was revealed that the large difference in the activity for the C2H2-SCR of NO arising from the particle size of zeolite was not caused by limited intracrystalline diffusion of the reductant, but that of NO2, which was strongly supported by the adsorption results obtained over the zeolites.


nitrogen oxides diffusion SCR acetylene HZSM-5 crystal size 



We thank the National Natural Science Foundation of China for financial support (Grant No.20677006).


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Xinping Wang
    • 1
  • Hongliang Yang
    • 1
  • Qing Yu
    • 1
  • Shixin Zhang
    • 1
  1. 1.State Key Laboratory of Fine ChemicalsDalian University of TechnologyDalianChina

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